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WO1996033754A1 - Catheter d'imagerie avec gaine ne necessitant pas de remplissage - Google Patents

Catheter d'imagerie avec gaine ne necessitant pas de remplissage Download PDF

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Publication number
WO1996033754A1
WO1996033754A1 PCT/US1996/005613 US9605613W WO9633754A1 WO 1996033754 A1 WO1996033754 A1 WO 1996033754A1 US 9605613 W US9605613 W US 9605613W WO 9633754 A1 WO9633754 A1 WO 9633754A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
sheath
reservoir
distal end
disposed
Prior art date
Application number
PCT/US1996/005613
Other languages
English (en)
Inventor
Robert J. Crowley
Original Assignee
Boston Scientific Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boston Scientific Corporation filed Critical Boston Scientific Corporation
Priority to AU55660/96A priority Critical patent/AU5566096A/en
Publication of WO1996033754A1 publication Critical patent/WO1996033754A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/445—Details of catheter construction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/4461—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe

Definitions

  • the present invention relates to a sheath for an imag ⁇ ing catheter with a means to retain fluids for use with ultrasonic imaging catheters and other catheters or guide- wires which require a fluid contact for operation.
  • Ultra- sonic imaging catheters are used for internally viewing body portions with ultrasonic waves generated by a generator/receiver disposed within the catheter. Such catheters involve the transmission and reception of ultra ⁇ sonic waves through the catheter's walls and especially through a "window" after the catheter has been worked into various body conduits.
  • Such ultrasonic catheters require a wave transmission fluid in the catheter between the trans ⁇ mitter, the receiver and the body part being examined.
  • the United States Patent to Crowley et al. discloses a disposable catheter which is formed from an acoustically transparent resilient flexible material in which the distal end of the catheter sheath is arranged to receive a septum thereon.
  • the septum can be a cylindrically-shaped plug which can receive a needle-tipped syringe that is filled with an acoustically transmitting fluid. While such mechanisms for filling the catheter with transmission fluid have proven successful, I have found that the use of a hypodermic needle to inject the fluids can be eliminated through the use of the acoustic septum and window of the present invention.
  • the United States Patent to Sieben et al., 5,243,988, also discloses an ultrasonic imaging device where the fluid is introduced into the proxi ⁇ mal end of the catheter and excess fluid is poured out from the proximal end after the catheter is filled.
  • the United States patent to Crowley, No. 5,400,785 discloses a fluid permeable film on the end of the catheter that allows the flow of a liquid into the catheter from a source. When the catheter is full, a coating on the film swells and prevents the flow of liquids in either direction whereby the opera ⁇ tional liquids are entrapped within the catheter.
  • the present invention relates to a catheter for diag ⁇ nosing body interiors utilizing the transmission and recep ⁇ tion of ultrasonic waves.
  • the catheter has a patient insertable distal end and a proximal end. It includes an elongated catheter sheath with a section that is transmissi ⁇ ble of ultrasonic waves.
  • a reservoir is disposed within the sheath and adjacent the distal end.
  • a frangible membrane formed of a conventional polymeric material such as silicone rubber, polyethylene or wax (paraffin) is disposed within the sheath and serves to seal the reservoir from the interi ⁇ or of the sheath.
  • the membrane preferably has a thickness between about 0.1 and 0.5 mm.
  • a liquid is disposed within the reservoir and contained therein by the membrane.
  • the liquid in the reservoir is used to bathe the ultrasonic wave generating and receiving device and provide for sonic coupling and transmission within the catheter so a signal can be generated and subsequently displayed of the body organ being viewed with the catheter.
  • the ultrasonic generating and receiving device is a transducer and this transducer is used to break the membrane and provide for bathing of the trans ⁇ ducer in the liquid in the reservoir.
  • the ultrasonic gener ⁇ ator and receiver is in electrical communication with a signal generating and receiving device for displaying data that is generated within the catheter.
  • Figures 1, 2 and 3 are side elevational views, partial ⁇ ly in cross-section, showing, stepwise, introducing a rotat- able ultrasound generating and receiving device into a catheter sheath, puncturing a membrane to enter a reservoir of liquid and lastly, bathing the device in the liquid whereby to provide for sonic coupling between the body part being examined and the ultrasonic generating and receiving device.
  • FIG. 1 there is shown an exploded view of an ultrasound imaging catheter device 10 which utilizes a rotatable and slidably insertable ultrasound generating and receiving means 11 and flexible catheter sheath 14 having a distal end 16 forming an acoustic window 13.
  • the acoustic window 13 comprises the entire distal end of the catheter sheath 14 and can be integral with the catheter sheath 14 and formed of the same material or can be of a different material and molded to the end of the catheter sheath.
  • a liquid filled reservoir 12 is disposed in the distal end of the catheter sheath 14.
  • the liquid commonly sterile water or saline, is used as an acoustic coupler between the organ being catheterized and the generating and receiving means 11.
  • a membrane 15 is disposed within the sheath 14 and forms a frangible cover for the reservoir 12.
  • the image generating and receiving means 11 comprises a single transducer element directed at an angle to the axis of a drive shaft 9.
  • the tip 11a of the transducer 11 is shown disposed adjacent the membrane 15 and prior to puncturing it so that the liquid in the reservoir 12 remains therein.
  • the view shows the insertion of the transducer 11 into the catheter sheath immediately prior to the tip 11a engaging the mem ⁇ brane 15.
  • the tip 11a is shown engaging the membrane 15 to break it.
  • the volume of the tip 11 and the drive shaft 9 will cause the liquid in the reservoir 12 to fill the sheath 14.
  • the size of the reservoir 12 is not critical so long as it contains sufficient liquid to fully enclose the transduc ⁇ er 11 and the drive shaft 9. If there is more liquid in the reservoir 12 than is needed to fill the sheath 14 when the transducer 11 and the shaft 9 are inserted, the liquid will merely flow out of the proximal end of the sheath 14 and can be discarded.
  • the catheter sheath 14 is filled with liquid and bathes both the transducer 11 and the drive shaft 9.
  • a conventional means (not shown) is provided for rotating the shaft 9 at a speed in the order of 1800 rpm.
  • a convention ⁇ al position detecting means (not shown) is disposed at the proximal end of the drive shaft 9 for detecting the instan- taneous angular position of the shaft 9 to represent the instantaneous angle position of the transducer 11.
  • a TV monitor (not shown) which is responsive to return signals from the transducer and to the position detecting means provides a display of the acoustical image based on the signals detected by the transducer.
  • the catheter 10 preferably uses a drive shaft 9 having an outer diameter through its length of about 1 mm or less.
  • the sheath 14 surrounds the distal end of the drive shaft 9 and is adapted to provide dynamic viscous drag to the shaft during its rotation to enhance the mechanical ability of the angular displacement between the proximal and distal ends of the catheter.
  • the difference between the outer diameter of the shaft 9 and the inner diameter of the corresponding portion of the sheath 14 is in the range of about 0.05 to 0.15 mm.
  • the acoustic window 13 is substantially transpar- ent to acoustical energy transmitted and received by the transducer 11.
  • the drive shaft 9 can have a liquid pumping screw form contour whereby the drive shaft 9 is exposed to liquid in the sheath and is driven in the direction tending to decrease the diameter of the outer coil.
  • the outer surface of the coil is effective to pressurize liquid dis- tally thereof.
  • the proximal end 20 of the catheter is of conventional construction, as is well to the art.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

Cathéter d'exploration diagnostique de l'intérieur du corps au moyen de l'émission et de la réception d'ondes ultrasoniques. Le cathéter comporte une extrémité distale (16) insérable dans le patient et une extrémité proximale (20) et est muni d'une gaine de cathéter allongée comprenant une section de transmission des ultrasons (13) adjacente à l'extrémité distale. Il comporte par ailleurs un réservoir disposé à l'intérieur de la gaine et adjacent à l'extrémité distale. Une membrane cassable (15) est disposée à l'intérieur de la gaine et isole le réservoir de l'intérieur de la gaine. Un liquide (12) est disposé à l'intérieur du réservoir, où il est retenu par la membrane cassable. Un transducteur (11) servant à émettre et recevoir les ondes ultrasoniques vient rompre la membrane en se glissant dans la gaine, ce qui fait que le transducteur va baigner dans le liquide et assurer la transmission sonique à l'intérieur du cathéter.
PCT/US1996/005613 1995-04-24 1996-04-22 Catheter d'imagerie avec gaine ne necessitant pas de remplissage WO1996033754A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU55660/96A AU5566096A (en) 1995-04-24 1996-04-22 Imaging catheter with no-fill sheath

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42685295A 1995-04-24 1995-04-24
US08/426,852 1995-04-24

Publications (1)

Publication Number Publication Date
WO1996033754A1 true WO1996033754A1 (fr) 1996-10-31

Family

ID=23692475

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/005613 WO1996033754A1 (fr) 1995-04-24 1996-04-22 Catheter d'imagerie avec gaine ne necessitant pas de remplissage

Country Status (2)

Country Link
AU (1) AU5566096A (fr)
WO (1) WO1996033754A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5284148A (en) * 1989-05-16 1994-02-08 Hewlett-Packard Company Intracavity ultrasound diagnostic probe using fiber acoustic waveguides
US5437283A (en) * 1992-12-11 1995-08-01 Tetrad Corporation Endosurgical ultrasonic probe with integrated biopsy actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5284148A (en) * 1989-05-16 1994-02-08 Hewlett-Packard Company Intracavity ultrasound diagnostic probe using fiber acoustic waveguides
US5437283A (en) * 1992-12-11 1995-08-01 Tetrad Corporation Endosurgical ultrasonic probe with integrated biopsy actuator

Also Published As

Publication number Publication date
AU5566096A (en) 1996-11-18

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